docs: record landed modeline detection

Advance the durable baseline to PR #132, remove the completed volatile lane,
and record the shared language pin, bounded modeline contract, Vterm Stage 2
landing, remaining deferrals, and current roadmap state.

docs/active-work.md

@@ -14,7 +14,7 @@ backlog.
   machine-local: `origin` may name this canonical URL, a release mirror,
   or something else, and therefore has no authority by name alone.
 - Canonical base at this snapshot:
-  `githubsucks/main` @ `86fc1bc` (Vterm Stage 2 #130 merged; protocol v18).
+  `githubsucks/main` @ `1dd47fc` (modeline detection #132 merged; protocol v18).
 - On the transfer source, `origin/main` named a release mirror at
   `d3fa632` and lagged badly. On the current destination, `origin` names
   the canonical URL. This difference is why all recovery begins by
@@ -48,46 +48,9 @@ git worktree list
 git status --short --branch
 ```
 
-The first command must expose `86fc1bc` or a newer intentional main.
+The first command must expose `1dd47fc` or a newer intentional main.
 If it does not, stop and repair the remote/fetch configuration.
 
-## Modeline detection implementation lane
-
-- Portable branch: `githubsucks/modeline-detection`
-- Approved framing head: `6b4f3c3`
-- Implementation head: `f8d05d2`
-- Base: originally canonical `main` @ `d5d9b9c`; current canonical `main`
-  @ `86fc1bc` (Vterm Stage 2 #130) is integrated before merge.
-- PR: #132, <https://github.com/levineuwirth/pmacs/pull/132>, open against
-  canonical `main` and explicitly authorized for merge.
-- State: Revision 2's bounded Emacs/Vim parser, explicit-over-inferred
-  precedence, alias normalization, shared fresh-load language pin, LSP path
-  guard, and all thirteen acceptance criteria are implemented. Protocol
-  remains v18.
-- Verification:
-  - focused modeline + shebang-pin acceptance before integration: 7 passed on
-    default LuaJIT and 7 passed on non-default Lua 5.4;
-  - post-integration `cargo fmt --check`;
-  - post-integration `cargo clippy --workspace --all-targets -- -D warnings`;
-  - post-integration `cargo test --lib`: 1,753 passed;
-  - post-integration `cargo test --lib --features crdt`: 1,929 passed;
-  - post-integration `cargo test --test m4_acceptance -- --skip basedpyright`:
-    120 passed, 3 ignored, 1 filtered;
-  - post-integration `PMACS_REQUIRE_GPU=1 cargo test -p pmacs-gpu`: 109 passed;
-  - post-integration `cargo test --workspace -- --skip basedpyright`: 2,888
-    passed across 82 suites, 19 ignored, 1 filtered;
-  - `git diff --check`.
-- Next: push the current-main integration and merge PR #132 as authorized.
-
-Recovery worktree on a machine that does not already own the branch:
-
-```sh
-git worktree add --track \
-  -b modeline-detection \
-  ../pmacs-modeline-detection \
-  githubsucks/modeline-detection
-```
-
 ## Parked lane: kill-ring browser + persistence
 
 - Portable branch: `githubsucks/kill-ring-browser`

docs/agent-handoff.md

@@ -1,10 +1,9 @@
 # Agent handoff — cross-machine continuity
 
-**Last updated: 2026-07-22, after Vterm Stage 2 PR #130 review round 2
+**Last updated: 2026-07-22, after modeline language detection (#132) and
-was addressed and approved for merge; mode system wiring (#129) and its
+Vterm Stage 2 (#130) landed on `main`, atop mode system wiring (#129/#131),
-handoff (#131), config registry (#127), Vterm Stage 1 terminal core (#126),
+config registry (#127), Vterm Stage 1 terminal core (#126), and completed
-and completed Themes Arc 4 (#120/#124/#125) are landed on `main`. Vterm
+Themes Arc 4 (#120/#124/#125). Vterm Stage 3 is not implemented.**
-Stage 3 is not implemented.**
 This file is the
 bridge between development machines. If you are an agent reading
 this on a fresh clone: this document plus the `docs/*-framing.md`
@@ -18,7 +17,7 @@ commands, read `docs/active-work.md` immediately after this file.
 
 ## 1. Where the project stands (2026-07-22)
 
-- `main` @ `d5d9b9c` (mode system handoff #131), protocol **v18**
+- `main` @ `1dd47fc` (modeline detection #132), protocol **v18**
   (`SUPPORTED=[6..18]`; v16 = `ThemeFacts`, v17 = `FontFacts`, v18 =
   `StatuslineSegments`).
 - **Config registry LANDED — #127** (`docs/config-registry-framing.md`
@@ -81,6 +80,21 @@ commands, read `docs/active-work.md` immediately after this file.
   - The built-in `mode` statusline provider reads `ctx.buffer`, so passive
     splits render their own mode. Real-daemon acceptance covers all ten framing
     criteria across both Lua backends and Linux/macOS CI.
+- **Modeline language detection LANDED — #132**
+  (`docs/modeline-detection-framing.md` rev 2; merge `1dd47fc`). Fresh loads
+  scan bounded Emacs `-*- mode: ... -*-` and Vim/Vi `ft=` / `filetype=`
+  modelines without evaluating file content, normalize common editor aliases,
+  and give explicit modelines precedence over inferred language.
+  - `builtin/runtime/syntax.lua` owns one per-buffer fresh-load decision:
+    modeline → bundled grammar extension → LSP filetype extension → exact
+    filename → shebang. Syntax, initial major mode, pairing, comments, and LSP
+    all reuse that pin; LSP retains its independent backing-path guard.
+  - Editing a modeline or shebang does not switch an attached parser or make
+    language-aware consumers diverge. Close/reopen re-evaluates changed file
+    metadata. Explicit post-load major-mode overrides remain independent.
+  - Bounded valid unknown names remain passive major modes without starting an
+    unavailable parser or server. All thirteen framing criteria are covered on
+    LuaJIT and Lua 5.4. No Rust or protocol surface changed; protocol stays v18.
 - **Syntax-highlight / language-detection side-quest (#114–#118)
   LANDED** — a one-shot arc built in sibling worktrees off main while
   the user's themes lane (`theme-faces`) ran concurrently in the shared
@@ -90,15 +104,15 @@ commands, read `docs/active-work.md` immediately after this file.
     the ABI-current `tree-sitter-containerfile`, NOT the dead
     `tree-sitter-dockerfile` which pins `tree-sitter ^0.20`), make,
     cmake, python, go, javascript (+jsx), typescript (+tsx), toml, zig.
-  - **Detection chain** (`resolve_active_language` in syntax.lua /
+  - **Detection chain and pin** (`builtin/runtime/syntax.lua`): modeline →
-    `buffer_language` in lsp.lua): extension → LSP filetype map →
+    grammar extension → LSP filetype map → filename → shebang. User-extensible
-    filename → shebang. New user-extensible Lua surfaces
+    Lua surfaces include `pmacs.parse.modeline_aliases`, `.shebangs`,
-    `pmacs.parse.shebangs` / `.filenames` and
+    `.filenames`, `language_from_modeline`, `language_from_shebang`,
-    `pmacs.parse.language_from_shebang` / `language_from_filename`.
+    `language_from_filename`, and the pinned `buffer_language`.
-    Grammar name MUST equal the `pmacs.lsp.config.<name>` key (grammar
+    `builtin/runtime/lsp.lua` delegates to that shared decision after enforcing
-    detection wins over the filetype map, so it fixes the LSP id too).
+    its backing-path requirement. Grammar name MUST equal the
-    A buffer keeps its first-attached grammar across edits/switches (no
+    `pmacs.lsp.config.<name>` key. A buffer keeps its pinned language across
-    re-sniff of a since-edited shebang).
+    edits/switches; close/reopen performs a fresh bounded inference.
   - **LSP configs added**: dockerfile (`docker-langserver --stdio`),
     cmake (`cmake-language-server`, config via
     `init_options.buildDirectory="build"` — it does NOT pull
@@ -249,9 +263,10 @@ commands, read `docs/active-work.md` immediately after this file.
     protocol-owned wire types/limits, and a deliberate complete-frame limit
     decision: 16 MiB is insufficient; use a measured legal-worst cap or
     aggregate bound, never silent chunking.
-  - **Stage 2 TUI is implemented on `vterm-tui`** (`docs/vterm-framing.md`
+  - **Stage 2 TUI LANDED ON `main` — #130** (merge `86fc1bc`;
-    Revision 7, criteria 15–27). `TerminalViewKey` keys per-frontend/window
+    `docs/vterm-framing.md` Revision 7, criteria 15–27). `TerminalViewKey` keys
-    projection state over one shared process/screen; logical row anchors retain
+    per-frontend/window projection state over one shared process/screen; logical
+    row anchors retain
     scroll/selection through reflow. One authenticated frontend controls at
     most one session, with atomic replacement and release on
     focus/switch/kill/detach.
@@ -312,8 +327,8 @@ commands, read `docs/active-work.md` immediately after this file.
     fix (#101).
   - **Arc 4 (themes + extensibility) COMPLETE** — named UI faces (#120),
     live GPU font preferences (#124), statusline providers (#125).
-  - **Arc 5 terminal stage ACTIVE** — compile mode (#113) and Vterm terminal
+  - **Arc 5 terminal stage ACTIVE** — compile mode (#113), Vterm terminal core
-    core (#126) landed; Vterm TUI is the next formal stage.
+    (#126), and Vterm TUI (#130) landed; protocol/GPU Stage 3 is next.
   - **Config registry COMPLETE (#127)** — not a numbered arc; it was the
     cross-cutting substrate ranked first on
     `docs/side-quest-backlog.md`'s north star, and it unblocks the
@@ -551,8 +566,8 @@ currently accepted for `autosave.interval-ms`, where a per-buffer
 value is meaningless.
 **Tab width is NOT a config gap** — see §5.
 Mode system (SHIPPED #129): minor modes, `buffer.after-mode-change`,
-mode-scoped settings, modeline detection, `describe-mode`, and persistence of
+mode-scoped settings, `describe-mode`, and persistence of explicit
-explicit major-mode overrides/clears across sessions.
+major-mode overrides/clears across sessions. Modeline detection shipped in #132.
 Highlight/detection (from the #114–#118 side-quest + injections #122):
 locals-query processing (run each grammar's LOCALS_QUERY so
 `#is?`/`#is-not? local` is honored instead of the current fail-closed
@@ -564,8 +579,8 @@ comment schemes), child-tree incrementality + range-scoped layer rebuild
 runtime/Lua-registered languages (v1 resolves only against
 `BUILTIN_LANGUAGES`), and the next injection *consumers* gated on new
 grammars — HTML/CSS/GraphQL/SQL (`<script>`/`<style>`, JS/TS template
-literals, doc-comment code); modeline detection as a 5th layer
+~~modeline detection as a 5th layer (`-*- mode: … -*-` /
-  (`-*- mode: … -*-` / `# vim: ft=…`);
+`# vim: ft=…`)~~ **SHIPPED #132**;
 byte-accurate multibyte cursor placement in `move_active_cursor_to`
 (still steps one codepoint per LSP byte column). A full Jupyter `.ipynb`
 setup (reader → editable → kernel execution) now has its JSON grammar

docs/modeline-detection-framing.md

@@ -1,7 +1,7 @@
 # Modeline language detection — side quest
 
-**Status:** Revision 2, approved for implementation by the user on 2026-07-22.
+**Status:** Revision 2 implemented and landed as PR #132 on 2026-07-22
-No implementation was present at approval.
+(`1dd47fc`). All thirteen acceptance criteria shipped without a protocol change.
 **Base:** `githubsucks/main` at `d5d9b9c`; protocol v18.
 
 ## Problem

docs/roadmap-2026-07.md

@@ -80,7 +80,7 @@ preference at protocol v17; and composable per-window
 `pmacs.statusline` providers transported to semantic/GPU frontends by
 protocol-v18 `StatuslineSegments`.
 
-### Arc 5 — Terminal, staged — VTERM STAGE 2 ON FEATURE BRANCH
+### Arc 5 — Terminal, staged — VTERM STAGES 1–2 LANDED
 
 - **Compile mode landed in #113**: line-oriented PTY/ANSI output,
   error-regex navigation, and `M-x compile`.
@@ -89,10 +89,10 @@ protocol-v18 `StatuslineSegments`.
   encoders, internal `TerminalManager`, read-only identity buffers, process
   lifecycle, control-free renderer-boundary cells, and headless real-PTY
   acceptance.
-- **Vterm Stage 2 TUI is implemented on `vterm-tui`**: terminal-window
+- **Vterm Stage 2 TUI landed in #130**: terminal-window composition,
-  composition, input/resize, per-context scroll/selection/copy, authenticated
+  input/resize, per-context scroll/selection/copy, authenticated frontend
-  frontend ownership, BEL/clipboard drainage, and the strict Lua surface.
+  ownership, BEL/clipboard drainage, and the strict Lua surface.
-- **Vterm Stage 3 protocol/GPU follows Stage 2**: additive protocol v19
+- **Vterm Stage 3 protocol/GPU is next**: additive protocol v19
   complete frames, authenticated daemon routing, and native GPU terminal
   rendering. Its framing must resolve the 16 MiB transport cap's incompatibility
   with the legal worst complete terminal frame; never silently chunk.

docs/side-quest-backlog.md

@@ -40,8 +40,8 @@ The direct continuation of the #114–#118 grammar/detection stack.
   languages (v1 resolves only against `BUILTIN_LANGUAGES`), and new
   injection *consumers* gated on grammars — HTML/CSS/GraphQL/SQL
   (`<script>`/`<style>`, template literals, doc-comment code).
-- **Modeline detection** — a 5th detection layer (`-*- mode: … -*-`,
+- ~~**Modeline detection**~~ — **SHIPPED as #132.** Bounded Emacs/Vim
-  `# vim: ft=…`) after extension → filetype → filename → shebang.
+  metadata now precedes extension → filetype → filename → shebang inference.
 - **JSON + YAML — PR #123 open.** Grammars and LSP configs exist on the
   feature line; review fixes are preserved on
   `json-yaml-handoff-2026-07-20`. A real YAML-through-pmacs smoke,
@@ -248,7 +248,7 @@ multi-language injections (#122), the config registry (#127), JSON + YAML
    main text path. Explicitly NOT a config-registry task; see the entry
    under "Cross-cutting substrate".
 
-Beyond those, the cleanest one-shots in the highlight family are
+Beyond those, the cleanest remaining one-shots in the highlight family are the
-**modeline detection** and the HTML/CSS grammars that light up more
+HTML/CSS grammars that light up more injection *consumers*; modeline detection
-injection *consumers*; the most-missed editing table-stakes remain
+shipped in #132. The most-missed editing table-stakes remain **word-kills +
-**word-kills + `C-SPC` set-mark**.
+`C-SPC` set-mark**.